第2讲_CATIA特征造型课件.ppt

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1、特征造型CATIA培训教程(2)特征造型(一)黄翔教授南京航空航天大学2021/10/8课程内容介绍三维造型的基本概念基于草图的特征造型实体建模练习内容介绍2021/10/8WhatisPartDesign?零部件设计应用程序提供了直观灵活的用户界面，可用于设计精确的3D机械零部件，从在装配上下文中绘制草图到重复细节设计。零部件设计应用程序能够适应复杂程度各异的零部件（从简单到高级）的设计要求。此应用程序将基于特征的设计能力与灵活的布尔方法结合起来，提供了高效直观的设计环境及多种不同的设计方法，例如设计后

2、的工作和本地3D参数化。作为一个可升级的产品，零部件设计可以和其它当前或未来的伴侣产品（如装配设计和创成式工程制图）共同使用。通过与CATIA解决方案第4版的互操作，它还提供了本行业用途最广泛的应用程序模块，以支持从初始概念到产品运行的完整产品开发过程。1、三维造型的基本概念2021/10/8AccessingthePartDesignWorkbenchAnywherefrom1-Startmenu2-File/Newmenu122021/10/8PartDesignInterface:GeneralPr

3、esentationCATPartextensionPartDesigntools...Sketcheraccess...ParttreeStandardtoolsFeatures...2021/10/8零件设计界面SeeWireframeandSurfacesInsertmenuSketch-basedTransformationsOperationsConstraintsDress-up2021/10/8APartisacombinationofoneormorefeatures,andbodiesT

4、hefirstfeatureisgeneratedfromasketch(profile),byextrusionorrevolutionFeaturesarecomponentsbasedonsketches(sketch-based)oronexistingfeatures(dress-upandtransformation).Theycanalsobegeneratedfromsurfaces(surface-based)Abodyisasetoffeaturesthatcanbeassembled

5、toapartthroughBooleanoperations(Assemble,remove,...)零件设计术语2021/10/8Thespecificationtreecontainsallthefeaturescreatedalongwiththesketchusedtodefinethem.AlltheSolidfeaturesarecontainedwithinanodecalledaPartBody.Theyalsocontainwireframesketchesthatareusedtoc

6、reatethefeatures.Asyoucreatefeaturestheyareaddedtothetreeinorderofcreation.TheremaybemultiplePartbodieswithinaCATPartwhichcanbeBooleanedtogetherinordertoformcomplexsolidmodels.PartbodiescanbeaddedtotheSpecificationTreebyselectingBodyfromtheInsertdropdownm

7、enuwheninthePartDesignWorkbench.ThePartbodycanthenberenamedbyeditingitsproperties.零件设计术语三维造型的基本概念：术语2021/10/8Ifanexistingfeatureisusedinthecreationofanewfeaturei.e.thesketchplaneforthenewfeatureiscreatedonanexistingFaceofanotherfeaturethenthenewfeatureisd

8、ependentonit.ThereforetheexistingfeaturebecomestheParentofthenewfeaturewhichisknownastheChild.IftheParentfeatureisdeletedtheChildfeaturewillneedtobeeditedandattachedtoanewparentorinsomecasesitmaybeisolatedotherwisei